19994024 has 8 divisors (see below), whose sum is σ = 37488810. Its totient is φ = 9997008.

The previous prime is 19994003. The next prime is 19994033. The reversal of 19994024 is 42049991.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19201924 + 792100 = 4382^2 + 890^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1249619 + ... + 1249634.

Almost surely, 2^19994024 is an apocalyptic number.

It is an amenable number.

19994024 is a deficient number, since it is larger than the sum of its proper divisors (17494786).

19994024 is a wasteful number, since it uses less digits than its factorization.

19994024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2499259 (or 2499255 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 19994024 is about 4471.4677679706. The cubic root of 19994024 is about 271.4147233668.

The spelling of 19994024 in words is "nineteen million, nine hundred ninety-four thousand, twenty-four".